Patents by Inventor Graham Butcher

Graham Butcher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Protective reaction rinse for autodeposition coatings
    Patent number: 6613387
    Abstract: The anticorrosive properties of a coating autodeposited on a metal substrate are improved by contacting the autodeposited coating with an aqueous solution containing Group IIA or Group IIB metal cations (e.g., calcium or zinc cations) and phosphate anions prior to curing. The rinse solution is preferably acidic and can be prepared, for example, from calcium nitrate and an oxy acid of phosphorus or zinc dihydrogen phosphate. Optionally, the rinse solution also includes an accelerator such as hydroxylamine.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: September 2, 2003
    Assignee: Henkel Corporation
    Inventors: Rajat K. Agarwal, Douglas Brown, William E. Fristad, Graham Butcher, Zafar Iqbal